The verb "avere" means "to have" in Italian. Just as in English and Romance languages, it also serves as an auxiliary (helping) verb to form perfect tenses ("have eaten", "have been reading", "had finished", etc.). Thus you will often need to know the present tense of "avere" to express that something happened in the past. Along with "essere" (to be), it is one of the workhorses of the Italian language!
This verb "to have" also powers many expressions in Italian. To express your age, you say "I have # years". Italians also say: "I have hunger", "I have thirst", "I have cold", "I have hot", and "I have sleep". So, even beginners need to know "avere".
Below are shown tenses of "avere" in the indicative, conditional, imperative and subjunctive moods. For your convenience, the moods are color coded. For instance, the indicative tenses are shown in green.